{
  "bibcode": "2025GCN.41860....1B",
  "createdOn": 1758172174730,
  "version": 2,
  "submitter": "Yodgor Rajabov at UBAI <rajabov@astrin.uz>",
  "format": "text/plain",
  "subject": "GRB 250916A: MAO/AZT-22 optical observations",
  "body": "O. Burkhonov, Y. Rajabov, B.Abidkhanov, S. Ehgamberdiev, Y. Tillayev (UBAI), A. Shaymanov (Maidanak Observatory/UBAI) report on behalf of UBAI team.\n\nWe observed the field of the GRB 250916A (Fermi GBM team, GCN 41839; Arya et al., GCN 41843; Cheung et al., GCN 41855) with the 1.5-m at Maidanak Observatory telescope AZT-22 equipped with the 4kx4k CCD SNUCAM camera(Im et al., 2010).\nWe obtained series of 300 sec. images in Bessel R filter on September 17, 18:35:18-19:02:20 UTC.\n\nThe OT (Belkin et al., GCN 41847; Mohan et al., GCN 41858, Moskvitin et al. GCN 41859) is clearly detected in the individual and stacked frames with the brightness of R = 19.76 +/- 0.03 (t_mid - T0 = 1.2229 days = 29.4917 hours).\n\nAll the data have been reduced by a single data processing pipeline, STDPipe (Karpov et al., 2022). \nImages obtained in Johnson Cousin filters were calibrated using the Gaia DR3 Synphot catalog.\nFor image template subrtaction we used PanSTARRS DR2 catalog. \nThe data has not corrected for the Galactic extinction.\n\nMaidanak astronomical observatory (MAO) is an observational facility of the Ulugh Beg Astronomical Institute (UBAI), Uzbekistan Academy of Sciences (http://maidanak.uz/).\n",
  "eventId": "GRB 250916A",
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Yodgor Rajabov at UBAI <rajabov@astrin.uz>",
  "circularId": 41860,
  "submittedHow": "web",
  "editedOn": 1758210905234
}